İki Farklı Su Kaynağında Gökkuşağı Alabalıklarından (Oncorhynchus mykiss, W., 1792) Elde Edilen Yumurtaların Kuluçka Randımanı ve Yavru Büyütme Özelliklerinin Karşılaştırılması
Yükleniyor...
Dosyalar
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Ondokuz Mayıs Üniversitesi Anadolu Tarım Bilimleri Dergisi
Erişim Hakkı
Özet
Çalışmada, gökkuşağı alabalığı (Oncorhynchus mykiss) anaçlarından elde edilen döllenmiş yumurtaların iki farklı su kaynağındaki açılma süreleri, larva çıkış gücü, keseli dönemde yaşama gücü ve yavru büyüme özellikleri karşılaştırılmıştır. Kuluçkadaki yumurtaların, yeraltı suyunda gözlenme süresi 186 gün-derece ve gözlenme oranı %89.24, larva çıkış süresi 328 gün-derece ve çıkış oranı %86.88, akarsuda gözlenme süresi 218 gün-derece ve gözlenme oranı %90.08, larva çıkış süresi 356 gün-derece ve gözlenme oranı %88.57 olarak tespit edilmiştir. Larvaların keseli dönemde ya ama gücü, yeraltı suyunda %94.60, akarsuda ise %93.29 olarak bulunmuştur. Kuluçka randımanı yeraltı suyunda %81.35, akarsuda %81.80 olarak saptanmıştır. Denemede, yeraltı suyunda besin kesesini tüketmiş serbest yüzen ve aktif yemlenmeye başlamış larvaların ortalama başlangıç ağırlığı 0.62±0.07 g olup, deneme sonunda ortalama 86.59±2.84 g ağırlığa ulaşmıştır. Akarsuda ise larvaların ortalama başlangıç ağırlığı 0.61±0.02 g olup, deneme sonunda ortalama 36.54±2.41 g olarak gerçekleşmiştir. Yem değerlendirme oranı, yer altı suyunda ortalama 1.04±0.04, akarsuda ortalama 1.22±0.09 olarak hesap edilmiştir. Deneme başlangıcındaki yumurta gelişim evrelerinde ve büyüme dönemlerinde yeraltı kaynak suyunun akarsuya oranla daha verimli olduğu belirlenmiştir.
In the present study, fertilized eggs obtained from rainbow trout ( Oncorhynchus mykiss , W., 1792) brood stocks were left to hatch in two different water so urces, and time of hatching, hatching rate, surviva l rate in yolk sac stage and growth characteristics of fry were compared. Ey eing of incubated eggs in ground water was 186 degree-days with an eyeing rate of 89.24%, a time of hatching as 328 degree-days and a hatching rate of 86.88% whereas eye ing in stream water was found to be as 218 degree-days, eyeing rate as 90.08%, time of hatching 356 degree-days and eyein g rate as 88.57%. Survival rates of larvae in yolk sac stage were 94. 6% in ground water and 93.29% in stream water. Effi ciency of incubation was detected to be 81.35% for ground water and 81.8 0% in stream water. During the experiment, the mean initial weight of sac-free, swimming-up active feeding larvae in grou nd water was 0.62±0.07 g and reached to 86.59±2.84 g at the end of the trial. The mean initial weight of larvae in stream water was 0.61±0.02 g and reached to 36.54±2.41 g a t the end of the study. The mean values for feed conversion rates were 1.04 ±0.04 in ground water and 1.22±0.09 in stream water . It was found that ground water is more efficient than stream water in terms of initial egg growth and growth periods.
In the present study, fertilized eggs obtained from rainbow trout ( Oncorhynchus mykiss , W., 1792) brood stocks were left to hatch in two different water so urces, and time of hatching, hatching rate, surviva l rate in yolk sac stage and growth characteristics of fry were compared. Ey eing of incubated eggs in ground water was 186 degree-days with an eyeing rate of 89.24%, a time of hatching as 328 degree-days and a hatching rate of 86.88% whereas eye ing in stream water was found to be as 218 degree-days, eyeing rate as 90.08%, time of hatching 356 degree-days and eyein g rate as 88.57%. Survival rates of larvae in yolk sac stage were 94. 6% in ground water and 93.29% in stream water. Effi ciency of incubation was detected to be 81.35% for ground water and 81.8 0% in stream water. During the experiment, the mean initial weight of sac-free, swimming-up active feeding larvae in grou nd water was 0.62±0.07 g and reached to 86.59±2.84 g at the end of the trial. The mean initial weight of larvae in stream water was 0.61±0.02 g and reached to 36.54±2.41 g a t the end of the study. The mean values for feed conversion rates were 1.04 ±0.04 in ground water and 1.22±0.09 in stream water . It was found that ground water is more efficient than stream water in terms of initial egg growth and growth periods.
Açıklama
Anahtar Kelimeler
Akarsu, Yeraltı suyu, Yumurta verimi, Döllenme oranı, Büyüme, Stream water, Ground water, Efficiency of Egg, Fertilization rate, Growth
Kaynak
WoS Q Değeri
Scopus Q Değeri
Cilt
Sayı
Künye
Baki, B. ve Kalma, M., "İki Farklı Su Kaynağında Gökkuşağı Alabalıklarından (Oncorhynchus mykiss, W., 1792) Elde Edilen Yumurtaların Kuluçka Randımanı ve Yavru Büyütme Özelliklerinin Karşılaştırılması”, OMÜ Anadolu Tarım Bilimleri Dergisi 26(3):258-264, 2011.
